Shaking amalgamating-table.



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PATENTED JULY 16, 1907. GQT. HOOD & W. NLHOGHRANE. SHARING AMALGAMATINGTABLE.

APPLICATION rum) n11. 2?. 1906.

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1": NORRIS PETERS c0, WASH'NCI'ON, a. c.

No. 860,474. PATENTED JULY 16, 1907.

G. T. HOOD &: W. M. GOGHRANE.

' SHARING AMALGAMATING TABLE.

APPLIOATIOH FILED MAR. 27. 1908.

1H: NoRms EETERS co, WASHINGTON. n. c.

N6. 860,474. PATENTED JULY 16, 1907.

' 'G. T; HOOD & w. M. OOGHRANE.

SHAKING AMALGAMATING TABLE.

APPLICATION FILED MAR. 27. 1906- 4 SHEETS-SHEET 3.

n1: NORRIS PEYERS co WASHINGTON c.

PATENTED JULY 16, 1907. G. T. HOOD dz W. M. GOOHRANB. SHAKINGAMALGAMATING TABLE.

APPLIOATION FILED MAR. 27. 1906.

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UNITED STATES PATENT OFFICE.

GEORGE TURNBULL HOOD AND WILLIAM MURDOOH COOHRANE, OF JOHANNESBURG.

TRANSVAAL.

SHAKING AMALGAMATING-TABLE.

Specification of Letters Patent.

Patented July 16, 1907.

Application filed March 27,1906. Serial No. 308,328.

To all whom it may concern:

Be it known that we, GEORGE TURNBULL Hoon and WILLIAM Munnoon COCHRANE,subjects of the King of GreatBrita'in, and residing at Johannesburg,Transvaal, have invented certain new and useful Improvements in ShakingAmalgamating-Tables, of which the following is a specification.

This invention relates to amalgamating tables at present principallyemployed in connection with tube mills,'and.which are ordinarily knownas shaking ama'lgamating tables in contradistinction to the stationarytables.

The object of the present invention is to obtain greater efficiency andto obviate the excessive wear and tear which takes place with thepresent constructions of this type of amalgamating table; to preventknocking or avoid jar in the table, and to provide a I driving mechanismof simple and effective construction.

We will at once proceed with a detailed description of our invention byaid of the accompanying drawings,

wherein Figure 1 is an end elevation of the general arrange- Fig.2 is afront elevation. Fig. 3 is a plan. Fig. 4 is an elevation, of the springcontaining cylinder 39 and other parts fixed ment of the tables anddriving gear.

to the table, Fig. 5 is a longitudinal sectional elevation of Fig. 4,Fig. 6 is a plan of Fig. 4, Fig. 7 is a side elevation of one of theadjustable bearings 22, Fig. 8 is an end elevation of Fig. 7, Fig. 9 isa plan of Fig. 7, Fig. 10 is a front elevation of one of the beveledfriction pulleys, and Fig. 11 is a side elevation of Fig. 10.

The tables 1 are preferably arranged, as shown in Figs. 1, 2 and 3, intwo parallel rows with their upper or raised ends arranged back to backas shown more particularly in Fig. 1. One or more pairs of tables 1 maybe employed, arranged as above described. In Figs. 2 and 3 two pairs orfour tables are shown but it will be evident that the arrangement shownmay be extended to provide any desired number. The top a of the table 1provides the amalgamated surface over which the pulp is caused to flow.

Above the tables 1 is arranged a framework consisting of the beams 2 ofwood or other suitable material.

This framework 2 carries the mechanism for oscillating the tables.

The tables 1 are built upon or carried by the rectangular frame 3 bracedby the connecting pieces 4, 5, top and. bottom, and the intermediatecross pieces 6, 7. The outer extremities of the pieces 4, 5, whichproject beyond the sides of the table 1 are turned up in the form of, orhave attached to them, vertical arms or brackets 8. To -the upperextremities of each of these arms is hinged or pivotally connected a rod9, the

bolt 10 serving to make said pivotal connection. The upper extremitiesof the supporting arms 9 are, by means of bolts 11, in like mannerpivotally connected to brackets or eye-bolts 12, which are, as shown,bolted or otherwise suitably fixed to the overhead framework 2. In thearrangement shown, four of the pivoted supporting rods 9 are providedfor each table, one attached to each corner. The several tables are bythis means so suspended that they can swing freely in one direction.

Arranged beneath the upper and lower ends of the table 1 are guides 13,which also serve as safety pillars should the table become disconnectedin any manner from the means whereby it is supported. These guides 13may as shown be bolted or otherwise suitably fixed to timbers or to anyother suitable foundation below the tables.

Between the two parallel rows of tables and running in convenientlydisposed bearings 15 supported by the overhead framework 2 is the maindriving shaft 16. On this shaft is fixed a beveled friction pulley 17covered with leather 17* or other suitable material (see Figs. 10 and11) which pulley serves for oscillating one pair of the tables. Asimilar pulley is provided on the shaft 16 for each pair of tables 1. Inthe construction shown the mechanism is so arranged that it oscillatesthe tables in a direction parallel with the longitudinal axis of themain driving shaft 16.

On the overhead framework 2 and arranged at right angles to the mainshaft 16 are a number of countershafts 18, one for each table. On theinner extremities of these counter-shafts are fixed beveled frictionpulleys 19 which gear the friction pulleys 17 on the main shaft 16. Eachof the friction pulleys 17 drives two of the countershafts 18 andthrough the latter two of the tables 1. The outer ends of each-of thecountershafts 18 run in a bearing 21, and the inner ends, on which arefixed the friction pulleys 19, run in adjustable yielding bearings 22.One of these latter bearings 22 is shown in Figs. 7 to 9, in which 23represents a sole plate, and 22 the bearing fitted with the brasses 22which are secured by means of the cap 22". The bearing is adapted toslide on the sole plate 23 between guides 24. The sole plate 23 at oneextremity is constructed with a bracket or projection 25 through whichextends a screw 26, which at its-inner extremity is connected to thesliding bearing 22. 27 is a nut which serves as a hand wheel foradjusting the bearing against a spiral spring 28 which surrounds thescrew 26 between the bearing 22 and the bracket or projection 25 on thesole plate 23. By rotating the screw 26 in either direction the bearing22 is moved correspondingly along the sole plate 23 against the spring28 to suitably adjust the countershaft 18 and its friction pulley 19 inrelation to the friction pulley 17 on the main shaft 16.

On each of the countershatts 18 is provided an eccentric 29 encircled byan eccentric strap 30 from which depends an eccentric rod 31. The lowerextremity of the eccentric rod 31 is pivotally and adjustably connectedto one arm 32 of a bell-crank lever, which lever is fulcrumed in aconveniently disposed bracket or standard 34 bolted or otherwisesecurely fixed to the foundation 14 at one side of the table.

The other arm 33 of this bellcrank lever, which projects, in an upwarddirection, serves for transmitting the oscillating motion derived fromthe eccentric 29, to the table.

The two intermediate pieces 6, 7, of the frame of the table 1 areextended or project beyond one side of the table, as indicated at 6 7This construction is shown more clearly in Figs. 4 to 6 in which3represents the rectangular frame of the table 1. On the extensions 6 7is bolted, riveted or otherwise securely fixed, a plate 35 which isturned up at the ends as shown at 36. In the plate 35 is formed a hole37 up which projects the extremity of the arm 33 of the bellcrank lever.On the plate 35 at one side of the hole is bolted a block 38 which isengaged by the extremity of the arm 33 of the bell-crank lever when thelatter is moved in one direction. On the plate 35 at the opposite sideof the hole 37 is bolted or otherwise securely fixed a cylinder 39 inwhich is arranged a spiral spring 40.

41 is a plunger working against the spring 40. The head or outerextremity of this plunger 41 is kept pressed forward by the spring sothat it always engages the upper extremity of the arm 33 of thebellcrank lever.

42 is a cylindrical piece which projects into the center of the spiralspring 40 which piece 42 at its rear extremity is formed with anenlargement forming an annular shoulder 43 which forms an abutment forthe spiral spring 40.

44 is a bolt or screw which screws through the upturned part 36 of theplate 35 and at its inner end engages the rear end of the cylindricalpiece 42 and serves for adjusting the spring 40 by moving said piece 42forward against the spring when it is rotated.

45 is a lock-nut for fixing the screw 44 after any desired adjustment ofthe spring 40 has been effected. The spring 40 is suitably adjustedaccording to the weight" of the table.

The cylinder 39 and spring 40, by maintaining a positive resilientconnection between the arm 33 of the bell-cranklever and the table,operate to prevent the transmission of jar to the table on the reversalof direction of motion of the bell-crank lever.

As shown, mechanism similar to that above described is provided for eachof the tables.

What we ;'claim asour invention and desire 'to protect by Letters Patentis 1. In an amalgamating table of the nature specified, the combinationwith the table comprising the frame and the stays, the latter formedwith extensions beyond one side of the table, of a plate formed with aslot carried by said extensions, a block secured to said plate, acylinder secured to said plate, a piston and spring in said cylinder,means for regulating the tension of the spring, and a lever, one arm 'ofwhich projects up through the slot in the plate and engages the blockand piston to oscillate the table, and means for actuating the lever.

2. In an amalgamating table of the nature specified, the combination ofa table having a portion of its frame bent upwardly, a supporting frame,links pivoted at their 'upper ends to said supporting frame and havingtheir lower ends pivoted to the upwardly projecting portions of thetable frame, means for oscillating said table and stationary guidesbelow said tables and normally out of contact therewith,

In witness whereof we have hereunto set our hands in the'presence of twosubscribing witnesses.

GEORGE TURNBULL HOOD. WILLIAM MURDOCH COCI-IRANE.

Witnesses; CHAS. OVENDALE, R. OVENDALE.

